Roger, let say you want yellow stripes over blue base color. I would shoot yellow paint over the area where the stripes would go - don't worry about masking but don't go nuts spraying all over - just spray enough to cover where the stripe will go. Now tape the stripes and paint the blue overall color. After the blue dries, remove the tape and you'll have your yellow stripes. This way, you'll only have to tape once.

As with most painting and especially on aircraft where weight is of paramount importace, spray paint ONLY to achieve hiding, no more. I see so many people lay on thick coats of paint on their planes. Not only is it unecessary, the thick coat of paint, in time, have a tendency to crack and peel. Not to mention the increase risk of runs and drips.